Multiline editors not to limit anchor position inputMethodQuery

Multiline editors not to limit anchor position inputMethodQuery

The queries were limited to current block, because that is the
available surrounding text. Input method side, however, cannot then
distinguish between anchor being really at start or end of the
surrounding text, or beyond it. Without the limitation there at least
is a way to know anchor is at unknown territory.

Change-Id: I388d33566388344ec816ea7d86662b7e36a3d7d0
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Joona Petrell <joona.t.petrell@nokia.com>